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temporarily revert to blocking polling.

This commit is contained in:
Christopher Jeffrey 2014-10-01 11:47:49 -07:00
parent e7e827ff39
commit e9150dd3ca
1 changed files with 108 additions and 0 deletions
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108
src/bitcoindjs.cc
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@ -299,6 +299,8 @@ typedef struct _poll_blocks_list {
struct async_poll_blocks_data {
std::string err_msg;
poll_blocks_list *head;
int poll_saved_height;
int poll_top_height;
Persistent<Array> result_array;
Persistent<Function> callback;
};
@ -829,6 +831,8 @@ async_get_tx_after(uv_work_t *req) {
* bitcoind.pollBlocks(callback)
*/
#if 0
static int block_poll_top_height = -1;
NAN_METHOD(PollBlocks) {
@ -953,6 +957,110 @@ async_poll_blocks_after(uv_work_t *req) {
delete req;
}
#endif
/**
* PollBlocks
* bitcoind.pollBlocks(callback)
*/
NAN_METHOD(PollBlocks) {
NanScope();
if (args.Length() < 1 || !args[0]->IsFunction()) {
return NanThrowError(
"Usage: bitcoindjs.pollBlocks(callback)");
}
Local<Function> callback = Local<Function>::Cast(args[0]);
async_poll_blocks_data *data = new async_poll_blocks_data();
data->poll_saved_height = -1;
data->poll_top_height = -1;
data->err_msg = std::string("");
data->callback = Persistent<Function>::New(callback);
uv_work_t *req = new uv_work_t();
req->data = data;
int status = uv_queue_work(uv_default_loop(),
req, async_poll_blocks,
(uv_after_work_cb)async_poll_blocks_after);
assert(status == 0);
NanReturnValue(Undefined());
}
static void
async_poll_blocks(uv_work_t *req) {
async_poll_blocks_data* data = static_cast<async_poll_blocks_data*>(req->data);
data->poll_saved_height = data->poll_top_height;
while (chainActive.Tip()) {
int cur_height = chainActive.Height();
if (cur_height != data->poll_top_height) {
data->poll_top_height = cur_height;
break;
} else {
// 100 milliseconds
useconds_t usec = 100 * 1000;
usleep(usec);
}
}
}
static void
async_poll_blocks_after(uv_work_t *req) {
NanScope();
async_poll_blocks_data* data = static_cast<async_poll_blocks_data*>(req->data);
if (!data->err_msg.empty()) {
Local<Value> err = Exception::Error(String::New(data->err_msg.c_str()));
const unsigned argc = 1;
Local<Value> argv[argc] = { err };
TryCatch try_catch;
data->callback->Call(Context::GetCurrent()->Global(), argc, argv);
if (try_catch.HasCaught()) {
node::FatalException(try_catch);
}
} else {
const unsigned argc = 2;
Local<Array> blocks = NanNew<Array>();
for (int i = data->poll_saved_height, j = 0; i < data->poll_top_height; i++) {
if (i == -1) continue;
CBlockIndex *pindex = chainActive[i];
if (pindex != NULL) {
CBlock block;
// XXX Move this to async_poll_blocks!
if (ReadBlockFromDisk(block, pindex)) {
Local<Object> obj = NanNew<Object>();
cblock_to_jsblock(block, pindex, obj);
blocks->Set(j, obj);
j++;
}
}
}
Local<Value> argv[argc] = {
Local<Value>::New(Null()),
Local<Value>::New(blocks)
};
TryCatch try_catch;
data->callback->Call(Context::GetCurrent()->Global(), argc, argv);
if (try_catch.HasCaught()) {
node::FatalException(try_catch);
}
}
data->callback.Dispose();
delete data;
delete req;
}
/**
* PollMempool
* bitcoind.pollMempool(callback)